Pennsylvania Crews Tear Down Obsolete Spring Garden Dam on Neshaminy Creek

Demolition crews have begun breaking apart the Spring Garden Dam on Neshaminy Creek in Tyler State Park, Pennsylvania, using a hydraulic hammer mounted on an excavator to reduce the concrete barrier.

The structure is one of many ageing dams on the creek, where water once powered a mill generations ago. The current concrete barrier was later built for recreation but no longer fulfils its intended purpose, state officials said.

Dave Dippold of the Pennsylvania Fish and Boat Commission described such structures as relic infrastructure that is ageing and obsolete. Removing them, he said, improves public safety, helps fish and other aquatic organisms move through the waterway, and returns the river to a free-flowing condition.

Pennsylvania has been unusually active in such work. American Rivers, a conservation group that maintains a national dam-removal database, said more than twice as many dams have been removed in the state as in any other.

Speaking at the site, Pennsylvania Secretary of Conservation and Natural Resources Cindy Adams Dunn linked the effort to a changing climate. She said streams and rivers face mounting pressure as air temperatures rise and rainfall arrives in heavier, shorter bursts, producing storm events that erode banks and carry pollution downstream. Keeping waterways as natural as possible, she argued, will matter more as the climate shifts.

The question of what to do with old dams is not confined to Pennsylvania. Communities across the United States and around the world are weighing whether to maintain, rebuild or remove structures built to control water, as heavier rainfall, prolonged drought and melting glaciers force fresh calculations about infrastructure.

In 2024, nearly 10 inches of rain washed away the Mill Pond Dam in Stony Brook, New York, damaging homes and carrying sewage from overflowing septic systems into Long Island Sound. Officials committed millions toward rebuilding that dam.

Keeya Wiki, a Yurok and Māori river advocate based in Berkeley, California, said governments should treat dams as infrastructure with finite lifespans rather than permanent fixtures. She said world leaders should recognise that dams are not a permanent solution, and that once built they may eventually need to be rebuilt or taken down.

Wiki added that removing dams is preferable to waiting for a catastrophic event, both to prevent one and to allow more thoughtful management of how water moves, so that surrounding ecosystems can stay safe and readjust to natural pathways.

Her emphasis on living in reciprocity with water echoes the approach taken by Pennsylvania officials: maintain dams that still serve the public, remove obsolete barriers, and restore more natural river flows.